In this research, the influence of post-annealing treatment on the microstructure, hardness, and tensile properties of cold-rolled austenitic stainless steel was investigated. The AISI 304 steel was asymmetrically rolled and then annealed in the temperature range of 700–900 °C for 10–60 min. By increasing the time and temperature of annealing treatment, the number of twins and strain-induced martensite (M) decreased. The reversion of martensite to austenite at 700 ℃ occurred through both shear and diffusional mechanisms. However, at higher temperatures, the shear reversion was the dominant mechanism. The microstructure of the annealed sample at 700 ℃ for 60 min showed a combination of continuous and discontinuous recrystallization grains, which was due to the simultaneous occurrence of shear and diffusional reversion transformation in this sample. After 10 min of annealing at 800 °C, the hardness dropped sharply to 293.6 HV, followed by a slight decrease with increasing time, which was a characteristic of continuous recrystallization. The results showed that with increasing annealing time at 700 °C, the yield strength (YS) and ultimate tensile strength (UTS) of steel decreased, while the total elongation (TE) value increased. As the time of annealing treatment increased, the depth and diameter of the dimples increased and the fracture surface became more ductile.

在这项研究中，研究了退火后处理对冷轧奥氏体不锈钢的组织，硬度和拉伸性能的影响。AISI 304钢不对称轧制，然后在700-900°C的温度范围内退火10-60分钟。通过增加退火处理的时间和温度，孪晶的数量和应变诱发的马氏体（M）减少。马氏体在700℃时通过剪切和扩散机制发生了向奥氏体的转变。但是，在较高的温度下，剪切回复是主要的机理。在700℃退火60min的样品的显微组织显示出连续和不连续的再结晶晶粒的结合，这是由于该样品同时发生剪切和扩散回复转变。在800°C下退火10分钟后，硬度急剧下降至293.6 HV，随后随时间的增加而略有下降，这是连续重结晶的特征。结果表明，随着700°C退火时间的增加，钢的屈服强度（YS）和极限拉伸强度（UTS）降低，而总伸长率（TE）则增加。随着退火处理时间的增加，凹坑的深度和直径增加，并且断裂表面变得更易延展。钢的屈服强度（YS）和极限抗拉强度（UTS）降低，而总伸长率（TE）增加。随着退火处理时间的增加，凹坑的深度和直径增加，并且断裂表面变得更易延展。钢的屈服强度（YS）和极限抗拉强度（UTS）降低，而总伸长率（TE）增加。随着退火处理时间的增加，凹坑的深度和直径增加，并且断裂表面变得更易延展。